Hi,
I am experiencing several glitches on my screen. They come and go and its hard to take screen shots of them. I will add them when I manage to make some.
1. Black or white rectangular boxes in the bottom panel. They go away when I move the mouse or draw a window over them.

2. Invisible window decoration. happens sometimes. Since I have window shadows active its easier to tell when it happens. This even sometimes affects the Whisker Menu. Can be reversed by clicking on the window a few times.
3. Flickering and flashing in gifs and videos in FireFox. If the gifs at the top of the screen it stops (weird

). The youtube videos only glitch if they are either embedded on other sides or are played in 480p. 360p, 720p and 1080p work fine. Is this because I use the HTML5 player? Also the youtube player sometimes has some flickering back boxes on the panel at the bottom of the player where the play/pause buttons are.
I am using LL 2.4 on a Lenovo E540 with Intel 4600 HD Graphics with the Intel Graphics Driver.
I appreciate all help I can get. These things sometime really get on my nerves.